P: LrC v15.5 Assisted Culling triggers crash and memory leaks
Version: Lightroom Classic 15.5.0.8
OS: Windows 11 Pro (build 10.0.26100)
GPU: NVIDIA RTX 3090, driver 32.0.16.1088 (22/07/2026)
RAM: 32 GB
Repro: Run Assisted Culling / auto-stack-by-similarity on a large batch of photos. Crashes reproducibly — 5 identical crashes since 2026-08-09.
Crash signature: Windows Application Error log shows Lightroom.exe faulting in ntdll.dll, exception code 0xc0000374 (STATUS_HEAP_CORRUPTION), consistently at the same fault offset (0x112165) across all occurrences.
Context: App log shows the last command before each crash was ag.library.stacking.generateAutoStacksBySimilarity. Lightroom's process memory usage reached 13.5–14.6 GB (41–45% of system RAM) just before crashing, suggesting a memory-handling bug in this feature on larger culling batches.
